What's funny is the Russian ultranationalists think tank people have been talking for some time about how they need a sovereign internet like China and how all the pro-west liberals were exerting too much influence on tech policy in the country to do that project. However, because of the war, the pro-west liberals all immigrated so now all the tech people left are patriots and they can really get started on that project.

Political views might be a factor but emigration is primarily limited by logistical challenges. You are assuming people can just leave everything and everyone behind and just fly into the unknown. Well, many do (and I didn't... yet), but without an EU visa, a new job, and/or a stash of money people often arrange to continue working for Russian IT employers remotely.

It's not just internet management that's affected. Currencies, semiconductors, energy — everything is affected in a similar way. Sanctions are a two-way street, they can have unintended long-term consequences (or maybe just consequences that nobody cares to think about) that are not necessarily negative to the target country and not necessarily positive to the imposing country.